RU2496012C1 - Exit gas cleaning device with two honeycomb bodies for creation of electric potential - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: exit gas cleaning device (11) includes at least the following: at least partially electrically conducting first honeycomb body (12) with the first front side (3) and the first rear side (26), at least partially electrically conducting second honeycomb body (13) with the second front side (25) and the second rear side (27), intermediate space (15) between the first honeycomb body (12) and the second honeycomb body (13), electric power supply source (18) for creation of electric potential between the first honeycomb body (12) and the second honeycomb body (13), as well as several electrodes (6) that are fixed on the first honeycomb body (12), spread to intermediate space (15) through the first rear side (26) to the first length (8) and located at the first distance (16) before the second front side (25) of the second honeycomb body (13). Besides, cleaning method of automobile exit gases containing soot particles is described.

EFFECT: providing compactness, possibility of accurate control of electric field in order to perform effective exit gas cleaning.

10 cl, 6 dwg

Description

The invention relates to a device for purifying exhaust gas to create an electric potential or an electric field and / or plasma. Using this plasma, the soot particles in the exhaust gas stream must at least agglomerate or electrically charge, so that this favors the deposition of particles in the dust filter. Such an exhaust gas purification device can be used, for example, in a car.

As a rule, in cars with mobile internal combustion engines and, above all, in cars with a diesel drive, the exhaust gases of the internal combustion engine contain quantities of soot particles that should not be emitted into the environment. This is specified by the relevant exhaust gas regulations, which specify the limit values for the amount and mass of soot particles per weight of exhaust gas or volume of exhaust gas, as well as partially for the entire vehicle. Soot particles are primarily unburned hydrocarbons and hydrocarbons in the exhaust gas.

It is known that by creating an electric field and / or plasma, small soot particles are agglomerated into larger soot particles and / or an electric charge of soot particles. Electrically charged soot particles and / or larger soot particles, as a rule, can be quite simply separated in the filtration system. Agglomerates of soot particles, due to their greater inertia, are transported more inertia in the exhaust gas stream and therefore are more easily deposited in places where the exhaust gas flow deviates. Electrically charged soot particles, due to their charge, are attracted to the surfaces on which they are deposited and give up their charge. And this also facilitates the removal of soot particles from the exhaust gas stream during automobile operation.

Already proposed systems for creating or (temporarily) maintaining an electric field and / or plasma, as a rule, are technically very complex and / or insufficient from the point of view of efficiency. Problems were also identified in the formation of a uniform and / or purposefully tuned electric field to the exhaust gas stream. In any case, so far no system has appeared to be ripe for mass production in the automotive industry.

Thus, the present invention is based on the task, at least partially, to solve the described problems of the prior art and to describe, first of all, an improved device for creating an electric field for a mobile exhaust gas purification system compared with the prior art. In addition, an exhaust gas purification method should be developed.

These problems are solved using the device according to the characteristics of paragraph 1 of the claims, as well as the method according to the characteristics of paragraph 8 of the claims. Other favorable variants of the device and method are indicated in the appropriately formulated as dependent claims. The characteristics indicated separately in the claims are combinable to each other in any technologically rational way and can be supplemented by explanatory circumstances from the description, while other embodiments of the invention are formed.

A device according to the invention is an exhaust gas purification device having at least:

a first, at least partially electrically conductive cellular body with a first front side and a first rear side,

- a second, at least partially electrically conductive cellular body with a second front side and a second rear side,

- the intermediate space between the first cell body and the second cell body,

- a power source for creating electrical potential between the first cell body and the second cell body, and

- several electrodes that are mounted on the first honeycomb body, which are rubbed through the first rear side to the first length into the intermediate space and are located at a first distance to the second front side of the second honeycomb body.

In such an apparatus for purifying exhaust gas by means of a power source, an electric field between the electrodes (first pole) on the first cellular body and the second cellular body (second pole) can be created. In this case, the electrodes act essentially like point electrodes in comparison with a planar electrode, which is formed by the second front side of the second cell body. Such a system is particularly suitable for creating an electric field and / or for creating a plasma, since on electric point-acting electrodes, due to the strong concentration of the electric field, electric charges usually come out in this region. Several electrodes significantly improves the formation of a purposefully defined field in the intermediate space.

The first honeycomb body and / or the second honeycomb body preferably have metal components that are electrically conductive. In addition to extruded honeycomb bodies, which are at least partially composed of such materials, honeycomb bodies, which consist of at least one at least partially structured metal foil (under certain conditions, also stacks, are also used alternately smooth and wavy metal foil). Preferably, the first honeycomb body and / or the second honeycomb body has channels extending from the front side to the rear side (directly and / or parallel), which under certain conditions are formed by the slotted walls of the channels. Preferably, the first honeycomb body and / or the second honeycomb body have a channel density of from 50 ccd to 1000 ccd, preferably about 600 ccd (channels per square inch). At the same time, enough reference points for the electrodes are obtained over the cross section, so that the plane or spatial manifestation of the electric field can be very accurately established. At least a portion of the electrodes, preferably all electrodes, are made as (straight) metal pins with a diameter of 0.5 to 3 mm, preferably 1 mm to 2 mm (millimeters).

Therefore, a significant structural detail of this device for purification of exhaust gas is the first honeycomb body, which is crucial for creating the entire structure for the formation of an electric field. Accordingly, regardless of the general structure, it can be described as follows: at least partially, an electrically conductive honeycomb body with a first front side and a first rear side, with several electrodes that are mounted on the first honeycomb body through the first rear side extend to the first length.

Preferably, the electrodes are electrically conductively connected to the cellular body, for example, soldered or welded. Preferably, the number of electrodes is at least 10, or even at least 30.

Based on the creation of electrodes, it is preferable if the first length over which the electrodes extend beyond the first rear side of the first honeycomb body is at least 2 mm (millimeters), preferably at least 3 mm. In addition, the first length should be a maximum of 20 mm, preferably a maximum of 15 mm, and particularly preferably a maximum of 10 mm. It is preferable that the electrodes fulfill the above requirements, while under certain conditions, at least for a portion of the electrodes, however, excellent first lengths may be provided.

Due to this embodiment of the first length (or protrusion) of the electrodes, on the one hand, it is ensured that an electric field is formed only between the electrodes and the second cell body, and not between the second cell body and the first cell body. At the same time, sufficient compactness and mechanical stability of the exhaust gas purification device is ensured. The exhaust gas purification device according to the invention has the advantage that the position of the electrodes can be set particularly precisely, and thus a particularly precisely defined electric field or plasma can be created in the intermediate space. In this case, the first length (or protrusion) of the electrodes can be purposefully adapted depending on the power supply to be cleaned exhaust stream and / or spatial conditions.

Alternatively or cumulatively to the mounting of the plurality of electrodes and the first honeycomb body, it is proposed that several electrodes that are mounted on the second honeycomb body, extend through the second front side into the intermediate space for a second length and are located at a distance to the first rear side of the first honeycomb body. The magnitude of this second length and / or the magnitude of the second distance may differ from the magnitude of the first length or from the magnitude of the first distance or be the same.

In addition, the device for cleaning exhaust gases is favorably improved if the first length of at least one electrode is different from the first length of the remaining electrodes. Thus, in the region of at least one longer or shorter electrode, a concentrated or expanded electric field can be created to the second front side of the second cell body. This can be rational, for example, in the central region of the cell body, where an enhanced flow of exhaust gases occurs, and therefore more particles must be deposited.

In addition to the first length, the electrodes may differ from each other (alternatively or cumulatively) with respect to at least one of the following properties:

- material

- orientation (relative to the direction of flow, relative to the front side and / or rear side, etc.),

- distance to the adjacent electrode,

- connection with the first honeycomb body (contact surface, contact length, connecting means, etc.),

- current supply (voltage sources, electrical connecting wires, etc.),

- form (rod, gear shape, plate, etc.).

An exhaust gas purification device is also advantageous if at least the first rear side of the first honeycomb body or at least the second front side of the second honeycomb body is non-planar. Due to this structure, the distribution of the flow through the cell bodies over the cross section can be influenced. For example, the channels of cellular bodies due to the non-planar shape of the hollow body can be made different in length. Thus, the structure of the hollow body or the dominant flow of exhaust gas can be adapted to the generated electric field.

In addition, it is possible that the first rear side of the first honeycomb body and / or the second front side of the second honeycomb body have a different shape from a flat (in other words, even or lying in the same plane) surface, while these differences in shape (or made with different lengths in the cross section of the intermediate space) are compensated by a change in the first length of the electrodes. However, in the end, the first distance between the electrodes and the second honeycomb body can be set at the same place in every place, although the first rear side of the first honeycomb body is located at a different distance from the second front side of the second honeycomb body.

In addition, it is preferable that at least one electrode has a conically tapered tip. In addition, it is preferred that all electrodes have such a tip. Due to the conically tapered tip, a greater concentration of the electric field in the region of this tip can be achieved, which further favors the formation of an electric field or plasma between the electrodes and the second cell body. At the same time, the pins that make up the electrodes can have a certain thickness, which is larger than the cross section of the tip, due to which high mechanical stability of the electrodes and good fastening of the electrodes on the first cellular body are achieved.

In addition, it is advantageous if at least one electrode in the direction of the intermediate space has a step. This means, first of all, that the diameter of the electrode changes sharply at least once, first of all, decreases in the direction of the intermediate space. Thus, even when the electrode is worn, reliable fastening is provided on the first honeycomb body.

It was in the calculation of the application in the car that the first distance was from 5 mm to 100 mm. A particularly preferred range is from 25 mm to 40 mm. It was found that such first distances are particularly favorable for creating an electric field or plasma.

In addition, it is also proposed to provide for the insulation surrounding the intermediate space. The first honeycomb body should, as a rule, be electrically isolated from the rest of the exhaust system and, above all, also from the surrounding exhaust pipe so that voltage can be created (only) between the electrodes and the second honeycomb. The electrical insulation that surrounds the intermediate space is also useful so that an electric field is formed only between the electrodes and the second cell body, and not between the electrodes and the wall of the exhaust pipe. It is also possible to prevent an electric field between the wall and the electrodes due to the fact that the distance from the electrodes to the wall is correspondingly greater than the distance from the electrodes to the second cell body. Particularly favorable as the electrical insulation between the two honeycomb bodies is a polymethyl methacrylate ring or the like.

In accordance with one improvement of the exhaust gas purification device, the second honeycomb body is annular. First of all, the second honeycomb body is arranged annularly around the initially central direction of the exhaust gas flow, so that the exhaust gases are rejected at least partially to pass through the second honeycomb body. Thus, the second honeycomb body can be used, first of all, as an annular body of a catalyst carrier.

It is also possible to perform electrical isolation of at least one mica honeycomb body. First of all, mica is a transparent material (aluminosilicate) with high electrical resistance. It is resistant to an operating temperature of at least 550 ° C and has a melting point of about 1250 ° C. In addition, mica is resistant to almost all media, such as, for example, alkalis, chemicals, gases, oils and acids. Mica insulation can be made, for example, in the form of a support mat, so that it simultaneously compensates for differences in expansion due to temperature differences between the first honeycomb body and / or the second honeycomb body, on the one hand, and the exhaust pipe, on the other hand. The electrical insulation must have a breakdown strength with respect to electrical voltages of at least 20 kV (20,000 volts), preferably at least 30 kV (30,000 volts).

In accordance with one improvement of an exhaust gas purification device, a voltage source is provided for generating an electric voltage of a maximum of 5 kV (5000 volts) to 30 kV (30000 volts) between the first cell body and the second cell body. The voltage supply of the electrodes, as a rule, occurs (individually, jointly and / or grouped) through the electrically conductive first honeycomb body. Thus, in this case, it is proposed, above all, the supply of high voltage. At a distance of 5 mm to 50 mm and a voltage of 5 kV (kilovolt), average field strengths in the intermediate space of greater than 1 million V / m (volt per meter) can be achieved. In the field of electrodes, in connection with the point shape of the electrodes, there is also an electric field concentration that clearly exceeds this value. Such electric filters are particularly suitable for plasma formation. A high concentration of the field in the region of the electrodes favors the exit of electrons from the electrodes.

In addition, it is proposed that the connection of the power source, at least the first cell body or the second cell body, at least in areas, occurred through a coaxial cable. In this case, the shielding of the coaxial cable can serve as a positive conductor for connecting the power source to the first cellular body or the second cellular body, and the inner conductor of the coaxial cable as a negative conductor for connecting the power source to the second cellular body or the first cellular body. The type of protection of the connection must be sufficient and independent of the coaxial cable of protection class IP68, and thus it must be dustproof and protected from constant immersion.

In addition, it is considered favorable if the first honeycomb body has at least one at least partially structured metal foil and the second honeycomb body has at least one filter material. A partially structured metal foil may also be provided in the second honeycomb body. At least partially structured metal foil, as a rule, is electrically conductive and therefore can provide power to the electrodes. At least partially, the structured metal foil may be wound, wound and / or stacked on a honeycomb body. The filtration material of the second honeycomb body makes it possible to efficiently deposit agglomerated or electrically charged soot particles in the second honeycomb body. Preferably, in this case, metal fabric and / or non-woven material, which is formed from a plurality of wire threads (welded or welded together), is considered as a filtration material. Then the second honeycomb body can be made, first of all, as an open particle separator, in which the channels are partially limited by a metal foil with deviations and openings, on the one hand, and filtration material, on the other hand, while the channels are from the second front side to the second the back side does not have a shutter, but there are several deviations or openings with which exhaust gases with particles are directed to the filtration material (or to the adjacent channel).

In addition, there is also provided a method for purifying soot particles in an exhaust gas using an exhaust gas purification device according to the invention, in which an electric field is applied at least periodically between the first honeycomb body and the second honeycomb body, so that at least a portion passing through a device for purifying exhaust gas of soot particles is at least ionized or agglomerated and deposited on a second honeycomb body.

It is preferable that the exhaust gas first passes through the first honeycomb body and, if necessary, is brought into contact with the first catalyst, then passes through the intermediate space in which the electric field is created so that ionization or agglomeration of soot particles occurs there and finally it enters the second cell body, where, preferably, soot particles are separated. The purified exhaust gas then leaves the exhaust gas purifier after exiting the second rear side.

In addition, it is preferable if the power source is operated so that the current between the first cell body and the second cell body is regulated by a value of from 0.005 mA (milliamps) to 0.5 mA, preferably from 0.01 mA to 0.1 mA. The current during operation of the exhaust gas purification device results from the transfer of charges to soot particles. Adjusting the current to the proposed range of values makes possible a sufficient charge of soot particles, but at the same time prevents the formation of a spark discharge.

In addition, the method according to the invention is advantageous if the electric field is activated and deactivated with a repetition rate of from 2 to 30,000 Hz (1 / second), preferably from 2 to 2000 Hz and particularly preferably from 50 to 2000 Hz. This repetition rate makes it possible to create an especially effective electric field, so that the soot particles are at least ionized or agglomerated.

Also, the method is advantageous if the repetition rate is controlled depending on the temperature of the exhaust gas. If the internal combustion engine already emits exhaust gases with a temperature that, for example, is suitable for catalytic conversion, the repetition rate and / or the potential difference value can be reduced.

It is also preferred if the electric field is activated with a linear increase. This means, for example, that, first of all, when operating a power source with a repetition rate, the voltage or current rises to the operating level during a time of at most half the reciprocal of the repetition frequency. It turned out that in this way a higher final voltage can be achieved without spark discharge.

In addition, an embodiment of the method is also proposed in which the first part of the electrodes is operated in a manner different from the second part of the electrodes. So, for example, the electrodes can be operated by separate current circuits, that is, activated or deactivated with other voltages and / or operating times. Thus, the electric field is regulated depending on the actual exhaust gas flow based on predetermined, calculated and / or measured parameters.

To prevent soot particles from depositing in the exhaust gas purification device according to the invention, an additional honeycomb body can be included which makes the flowing exhaust gas flow more uniform and / or even laminar so that when flowing through the subsequent exhaust gas purification device according to the invention flow swirls appeared with dead zones, which favored the deposition of soot particles.

The invention also relates to an automobile having an internal combustion engine, as well as an exhaust gas purification device for purifying exhaust gases of an internal combustion engine.

The advantages and specific design options described for the exhaust gas purification device according to the invention, as well as the specific modes of action and advantages explained for the method according to the invention, are similar and technologically rational within the framework of the invention transferred to each other.

The invention and the technical context are further explained in more detail in the figures. The figures show particularly preferred embodiments to which the invention, however, is not limited. First of all, it should be pointed out that the figures and, above all, the presented size ratios are only schematic. Shown on:

figure 1: the first embodiment of a device for purification of exhaust gas according to the invention,

figure 2: the second variant of the device for purification of exhaust gas according to the invention,

figure 3 is another variant of the first cell body,

figure 4 an additional variant of the first cell body,

Figure 5: a top view of the first cell body, and

6 a car having an exhaust gas purification device according to the invention.

Figures 1 and 2 respectively show an exhaust gas purification device 11 according to the invention. The exhaust gas purification devices 11 have a first honeycomb body 12 as well as a second honeycomb body 13.

The first honeycomb body 12 has channels 5 extending from the first front side 3 to the first rear side 26. Similarly, the second honeycomb body 13 has channels 5 extending from the second front side 25 to the second rear side 27. the pins are shaped in the form of electrodes 6. The electrodes 6 are inserted into the channels 5 of the first honeycomb body 12 to a second length 21, while they, preferably (but not necessarily), are sized such that (the ends of the electrodes 7) the electrodes do not protrude from the first front side 3. Second length 21, across enshey least part of the electrodes 6 may be made different so that, for example, are implemented a variety of (electrical) contact. Preferably, the first honeycomb body 12 is made of a smooth and structured metal foil 2. The electrodes 6 can be fixed to the metal foil 2 by soldering and / or welding. Preferably, the electrodes 6 do not completely cover those channels 5 into which they are inserted. The metal foil 2 here serves, at least in part, as electrical conductors, with which a current (separately or jointly) is directed to the electrodes.

The second honeycomb body 13 in the structural examples according to figures 1 and 2 also partially consists of a structured metal foil 2, and here it has a deflecting structure 30. It is preferable that several deflecting structures 30 are located in each channel 5. In addition, the second honeycomb body 13 has filtration materials 29, preferably metal non-woven materials (with a catalytic coating). Soot particles contained in the exhaust gas stream can be deposited in the filtration materials 29. First of all, the deposition occurs because (including without alternatively closing the channels), the exhaust gas flow passing through the second honeycomb body 13 is deflected by the deflecting structures 30 in the direction of the filtration material 29. The deflecting structures 30 close the channels 5 of the second cell body 13 only partially.

In each case, an intermediate space 15 is provided between the first cell body 12 and the second cell body 13, in which an electric field or plasma can be created during operation. The first honeycomb body 12 and the second honeycomb body 13 with the first back side 26 and the second front side 25 are spaced apart (opposite to each other) by a second distance 22. The electrodes 6 extend a first length 8 from the first honeycomb body 12, so that between the electrodes 6 and the second the front side 25 of the second honeycomb body has a first distance 16. In addition, the electrodes 6 have points 10, which are preferably conical in order to achieve an increased concentration of electric field on the points 10.

The first honeycomb body 12 and the second honeycomb body 13 are isolated from each other by electrical insulation 14. In addition, there is a power supply 18, by which an electrical voltage can be generated between the first cell body 12 (or many electrodes) and the second cell body 13 ( or its second front surface).

There are various design possibilities for how the first cell body 12 and the second cell body 13 can be isolated from each other. The first honeycomb body 12 and the second honeycomb body 13 may — as shown in FIG. 1 — be provided with insulation 14 which electrically separates the entire exhaust gas purification device 11. Then, if necessary, similar insulation is also made before the first honeycomb body or after the second honeycomb body in order to electrically disconnect the rest of the exhaust system, when, for example, the first honeycomb body is supplied with electrical energy through the housing.

However, according to the embodiment of FIG. 2, the first honeycomb body 12 can also be separated from the exhaust system by the insulation 14, so that power is supplied through the housing or the exhaust pipe 20 due to an electrically insulated contact. To limit the electric field or the intermediate space 15, insulation 14 can also be provided, for example, along the perimeter of the ring, as indicated in FIG. 2. Due to this ring-shaped insulation 14, the creation of an electric field between the exhaust pipe 20 and the electrodes 6 can be prevented.

According to the embodiment of FIG. 1, an overlap 17 can also be provided for the insulation 14, by which flow around the insulation 14 with exhaust gases or soot particles can be prevented, at least in part. Thus, deposits of soot particles in the insulation region 14 and the formation of a short circuit can be prevented.

The electrical insulation 14 during operation of the device 11 for cleaning the exhaust gas can be regularly released from deposits due to the fact that the electrical insulation 14 is supplied with a short and strong current pulse, which leads to heating and, finally, combustion of soot particles. Several such current pulses may also be produced. For example, it is possible to produce such a series of current pulses regularly before or for starting operation of an exhaust gas purification device according to the invention.

Such a current pulse can be caused by a short voltage peak, which is applied through the insulation 14 or between the first cell body 12 and the second cell body 13. Such a voltage peak can clearly exceed the normal operating voltage, i.e., for example, be clearly higher than 30 kV (30000 volts) and, above all, clearly above 50 kV (50,000 volts). At such high voltages, the electrical conductivity of the deposited soot on the electrical insulation is created, so that a current pulse arises. It is important that the voltage peak or current pulse be very short in time, so that only deposits of soot particles burn out, and insulation 14 is not damaged.

Figure 3 and figure 4 shows other options or details of the first cell bodies 12 of the device for purification of exhaust gas. And these honeycomb bodies 12 also have metal foil 2, which defines channels 5 that extend from the first front side 3 to the first rear side 26. Cellular bodies 12 also have in each case a perimeter surface 4 that surrounds the first honeycomb bodies 12 between the first front side 3 and the first back side 26. Several electrodes 6 are respectively inserted into the channels 5 of the first honeycomb body 12 and protrude a first length from the first back side 26.

According to the variant of FIG. 3, the first length 8 of the portion of the electrodes 6 may be different (here, for clarity, only 3 electrodes are shown, which all differ from each other (orientation, shape, length, etc.), but this is not necessary) . In the embodiment of FIG. 4, the first length 8 of the electrodes 6 is the same. However, according to FIG. 4, the first rear side 26 has a concave shape. The ends 7 of the electrodes 6 located inside also form a concave shape here. For example, it is possible that opposite the first honeycomb body 12 according to FIG. 4, a second honeycomb body is arranged that is suitably convex in shape, so that the intermediate space between the first honeycomb body 12 and the second honeycomb body is curved. It is also possible that the first honeycomb body 12 is convex, and the second honeycomb body is respectively concave. It is also possible that the second distance between the first cell body 12 and the second cell body in the region of the intermediate space changes and / or the first distance between the electrodes 6 and the second cell body changes. In this way, the desired formation of an electric field or plasma in certain areas of the intermediate space can be achieved and at the same time a targeted influence on the distribution of the exhaust gas flow through the cell bodies.

Electrodes can be made in different ways. Figure 3 presents three different versions of the ends 7 of the electrodes 6. The uppermost electrode 6 has a bend or break. The middle electrode 6 has a tapered tapered tip 10. Alternatively, it is possible that the electrode 6 has a screwdriver-shaped tip that ends in a smooth line. The lowest electrode 6 is made with a straight, flat or blunt end 7. In others, structural forms not shown here, the electrodes 6 can also have serrated ends 7 with several tips or rounded ends 7. The electrodes 6 have a diameter of 9, respectively, while the electrodes can be made different.

Figure 5 shows a top view of the first rear side 26 of the first honeycomb body 12. In this first honeycomb body 12, electrodes 6 are respectively inserted into the individual channels 5. The first honeycomb body 12 consists of several packs containing a smooth and structured metal foil 2, which retinue in such a way that all metal foil with its opposite edges adjoins the body of the honeycomb body and is soldered or welded there. It is possible that the first honeycomb body 12 has a first radial zone 23 and a second radial zone 24, and the density of the electrodes 6 in the first radial zone 23 is different from the density of the electrodes in the second radial zone 24. It is also possible that, for example, the first length and / or the shape of the ends or the tips of the electrodes 6 in the first radial zone 23 and in the second radial zone 24 are different. First of all, the distances 28 of the electrodes 6 can differ from each other in the first radial zone 23 and in the second radial zone 24. Also, different power sources can be provided for the zones, so that independent operation of the electrodes in the zones can be carried out. Due to these measures, it is possible to change the electric field along the cross section of cellular bodies.

6 schematically shows a vehicle 1 having an internal combustion engine 19 and an exhaust pipe 20, while an exhaust gas purification device 11 according to the invention is provided on the exhaust pipe 20.

The invention provides an exhaust gas purification device that is very compact and therefore suitable for use in the automotive industry. In addition, it makes it possible to fine-tune the electric field in order to efficiently clean the exhaust gas. First of all, with its help the problems indicated at the beginning are overcome.

LIST OF REFERENCE NUMBERS one Car 2 Metal foil 3 First front side four Perimeter surface 5 Channel 6 Electrode 7 the end 8 First length 9 Diameter 10 Point eleven Exhaust Gas Purifier 12 First cell body 13 Second cell body fourteen Insulation fifteen Intermediate space 16 First distance 17 Overlap eighteen Power supply 19 Internal combustion engine twenty Exhaust pipe 21 Second length 22 Second distance 23 First radial zone 24 Second radial zone 25 Second front side 26 First back side 27 Second back side 28 Distance 29th Filtration material thirty Deviation structure

Claims (10)

1. An apparatus (11) for treating exhaust gas, having at least:
- a first, at least partially electrically conductive cellular body (12) with a first front side (3) and a first rear side (26),
- a second, at least partially electrically conductive cellular body (13) with a second front side (25) and a second rear side (27),
- the intermediate space (15) between the first cell body (12) and the second cell body (13),
- a power source (18) for generating an electric potential between the first cell body (12) and the second cell body (13), and
- several electrodes (6), which are mounted on the first honeycomb body (12), extend through the first rear side (26) to the first length (8) into the intermediate space (15), and are located at the first distance (16) to the second front side (25) a second cell body (13). 2. An exhaust gas purification device (11) according to claim 1, wherein the first length (8) of at least one electrode (6) is different from the first length (8) of the remaining electrodes (6). 3. An exhaust gas purification device (11) according to claim 1, wherein at least the first rear side (26) of the first honeycomb body (12) or at least the second front side (25) of the second honeycomb body ( 13) have a non-flat shape. 4. The device (11) for cleaning the exhaust gas according to claim 1, in which the first distance (16) is from 5 mm to 50 mm 5. The device (11) for cleaning the exhaust gas according to claim 1, in which the insulation (14) surrounding the intermediate space (15) is provided. 6. The device (11) for cleaning the exhaust gas according to claim 1, in which the power source (18) is designed to create an electric voltage of more than 5 kV between the first cell body (12) and the second cell body (13). 7. An exhaust gas purification device (11) according to claim 1, wherein the first honeycomb body (12) has at least one at least partially structured metal foil (2) and the second honeycomb body (13) has at least one filter material (29). 8. A method for purifying an exhaust gas having soot particles using an exhaust gas purification device (11) according to one of the preceding claims, wherein an electric field is applied at least periodically between the first honeycomb body (12) and the second honeycomb body (13) so that at least a portion of the soot particles passing through the exhaust gas purification device (11) is at least ionized or agglomerated and deposited on the second honeycomb body (13). 9. The method according to claim 8, in which the first part of the electrodes is operated in a manner different from the second part of the electrodes (6). 10. A vehicle (1) having an internal combustion engine (19), as well as an exhaust gas purification device (11) according to one of claims 1 to 7 for purifying exhaust gases of an internal combustion engine (19).

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